No way to remove or view submenu internal names

[R3ngad33]

MENU ADD MainMenu 0 -m Test Menu, TestMenu
MENU REMOVE MainMenu 0
MENU ADD TestMenu 0 -t test

The above scenario shows that submenus without an entrance are supported, but there currently is not a way to remove any submenus created completely. There should be a way to remove submenus

proposed command:
MENU REMOVE submenu
ex:
MENU REMOVE TestMenu

also a longer existing system may build up many unlinked submenus there should be a way to list all submenu internal names

proposed command:
SHOW SUBMENU menu - list all submenus in the target menu
SHOW SUBMENU/ALL - shows all submenu internal names